<script lang="ts" setup>
import Player from './videoPlayPage/Player.vue'
import {getChapter} from '~/api/product'
import {getVideo} from '~/api/video'
import {IChapter} from '~/types/api'

// tab数据
const navList = [
    {
        title: '章节',
        img: '/images/zhangjie.png',
        imga: '/images/zhangjiea.png'
    },
]

/**
 * 视频状态管理
 */
let _episodeId = $ref(Number(useRoute().query.eid))

const realVideoId = $computed(() => {
    return Number(useRoute().query.id) || 1
})


/**
 * 目录接口数据
 */
let chapterList = $ref<IChapter[]>([])
const getChapterList = async () => {
    const res = await getChapter(realVideoId)
    chapterList = res.data
    _episodeId = _episodeId || res.data[0].episodeList[0].id
    await getVideoData(_episodeId)
}

/**
 * 集数选择
 */
const sectionClick = async (val: any) => {
    await getVideoData(val.id, true)
}

/**
 * 视频源
 */
const xdclassPlayer = $ref<{
    newPlayer: (playSrc: string) => void
    sendDanmu: (playSrc: string) => void
}>()
const getVideoData = async (id?: number, clickChose?: boolean) => {
    const res = await getVideo({episodeId: id})
    if (res.code === 0) {
        _episodeId = id
        clickChose && navigateTo(`videoPlayPage?id=${realVideoId}&eid=${id}`)
        xdclassPlayer?.newPlayer(res.data.playResult)
    }
}
onMounted(async () => {
    await getChapterList()
})

// 左侧tab项点击
let navSelect = $ref(null)
let expandShow = $ref(false)
const navClick = (val: number) => {
    if (navSelect === val) {
        navSelect = -1
        expandShow = !expandShow
        return
    } else {
        // 章集默认展示集播放视频
        if (val === 0) {
            if (process.server) return
            const oChapterSection = document.querySelector('.chapter-section') as HTMLDivElement
            setTimeout(() => {
                for (let i = 0; i < oChapterSection.children.length; i++) {
                    const chapter = oChapterSection.children[i]
                    for (let i = 0; i < chapter.children[1].children.length; i++) {
                        const episode = chapter.children[1].children[i]
                        // 将播放的对应集展示在视口
                        if (episode.classList.contains('selected')) {
                            chapter.scrollIntoView({behavior: 'auto', block: 'center'})
                            document.body.scrollIntoView()
                            break
                        }
                    }
                }
            })
        }
        expandShow = true
        navSelect = val
    }
}

// 弹幕开关
let {global} = $(useDanmuState())
const switchDanmu = function () {
    global = !global
}

// 发送弹幕
let danmuContent = $ref('')

function sendDanmu() {
    xdclassPlayer.sendDanmu(danmuContent)
    danmuContent = ''
}

useHead({title: '小滴课堂 - 视频播放'})
</script>

<template>
    <div wfull flexc flex-col>
        <div wfull bg="#191917" absolute h-91vh :style="{ top: '90px' }"/>

        <!-- 左侧tab -->
        <div class="video-play" h-90vh>
            <div class="left">
                <div class="left-item" v-for="(item, index) in navList" :class="{ active: navSelect === index }"
                     @click="navClick(index)" :style="{ backgroundColor: navSelect === index ? '#20201e' : '' }">
                    <cdn-img wh-28 :src="navSelect === index ? item.imga : item.img"/>
                    <div class="text">{{ item.title }}</div>
                </div>
            </div>
            <!-- 章集 -->
            <div v-show="expandShow">
                <div class="sidebar-left" v-show="navSelect === 0">
                    <div class="chapter-section">
                        <div class="item" v-for="(item, index) in chapterList">
                            <div class="chapter-text" :title="item.title">第 {{ index + 1 }} 章&nbsp; {{
                                    item.title
                                }}
                            </div>
                            <div class="section">
                                <div class="section-item" v-for="(subItem, subIndex) in item.episodeList"
                                     :class="{ selected: subItem.id === _episodeId }" @click="sectionClick(subItem)"
                                     :title="subItem.title">
                                    第 {{ subIndex + 1 }} 集 &nbsp;{{ subItem.title }}
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- 视频播放器  -->
            <div flex="~ col" class="video-player">
                <div class="player relative flex items-center" id="video_wrapper" style="width: 100%; height: 97%"
                     @click="navSelect = null">
                    <ClientOnly>
                        <Player ref="xdclassPlayer" :episode-id="_episodeId" :product-id="realVideoId"
                                :chapter-list="chapterList"
                                @get-video-data="getVideoData"/>
                    </ClientOnly>
                </div>
                <div mt-18px class="danmu">
                    <cdn-img class="cursor-pointer h-25px bg-none mr" @click="switchDanmu()"
                             :src="`/images/video_${global ? 'open' : 'close'}.png`"/>
                    <a-input mr-25px rounded-5px @keypress.enter.native="sendDanmu()" v-model:value="danmuContent"
                             placeholder="请输入你要发送的弹幕"/>
                    <a-button @click="sendDanmu()">发送</a-button>
                </div>
            </div>
        </div>
    </div>
</template>

<style lang="less" scoped>
.nav-bg {
    background-color: #20201e;
    height: 82.5%;
    width: 360px;
    left: 140px;
    position: absolute;
    z-index: 1000;
}

:deep(.video-js .vjs-next-control .vjs-icon-placeholder:before) {
    font-family: VideoJS;
    font-weight: normal;
    font-style: normal;
    content: '\f120';
    transform: rotate(180deg);
    cursor: pointer;
}

.introduce {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 350px;
    height: 87%;
    justify-content: space-between;
    padding-bottom: 21px;
}

.video-player {
    flex: 1;
    margin-right: 80px;
}

:deep(.vjs-paused) {
    .vjs-big-play-button {
        display: block;
    }
}

.video-play {
    width: 100%;
    font-size: 12px;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 20px 20px 20px 0;

    .left {
        width: 140px;
        height: 87%;
        display: flex;
        flex-direction: column;
        justify-content: space-around;

        .left-item {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
            padding: 10px;
            color: #aaaaaa;
            cursor: pointer;
        }

        .active {
            background-color: #3b4046;
            color: #fff;
        }

        .text {
            margin-top: 5px;
            font-size: 16px;
            font-weight: 600;
        }
    }

    .chapterIcon {
        height: 45px;
        position: absolute;
        z-index: 1000;
        top: 40%;
        cursor: pointer;
    }

    .tabs {
        color: white;

        li {
            cursor: pointer;
            width: 80px;
            height: 80px;
            border-radius: 5px;
            background-color: #646e77;
            text-align: center;
            font-size: 20px;
            font-weight: 500;

            &:not(:nth-child(2)) {
                line-height: 80px;
            }

            &:nth-child(2) {
                padding: 18px;
                line-height: 22px;
            }
        }
    }

    .danmu {
        display: flex;
        align-items: center;
        justify-content: center;

        & > *:not(img) {
            color: white;
            background-color: #565e65;
        }

        & > button {
            width: 100px;
            border-radius: 5px;
        }
    }

    .play-main {
        width: 1200px;
        display: flex;
        justify-content: space-between;
        position: relative;
        height: 600px;
    }

    .sidebar-left {
        cursor: pointer;
        background-color: #20201e;
        color: #fff;
        position: absolute;
        z-index: 1001;
        left: 140px;
        height: 89.1%;

        .chapter-section {
            padding: 10px;
            overflow-y: auto;
            height: 100%;

            .item {
                margin-bottom: 5px;

                .chapter-text {
                    width: 350px;
                    white-space: nowrap;
                    overflow: hidden;
                    text-overflow: ellipsis;
                    line-height: 30px;
                    font-size: 14px;
                    margin-bottom: 5px;
                }

                .section {
                    margin-left: 20px;
                    width: 350px;
                    color: #ddd;

                    .section-item {
                        white-space: nowrap;
                        overflow: hidden;
                        text-overflow: ellipsis;
                        line-height: 25px;
                        color: hsla(0, 0%, 100%, 0.6);
                        margin-bottom: 5px;
                    }

                    .selected {
                        color: #ec1500;
                    }
                }
            }
        }
    }

    .play-header {
        display: flex;
    }
}
</style>
